PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs SB iso raise 2.5bb

BB vs SB iso raise 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · BTN limps, SB isolates to 2.5bb · Big blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.3bbYour cards?
1bb
1bb
2.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 75.5%Call 12.2%Raise 5/7.5bb 12.3%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when BTN limps, SB isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

BTN limps, SB isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 75.5%, calls 12.2% and raises 5/7.5bb 12.3%. Always call: 22-55, A5s-A6s, K4s. Always raise 5/7.5bb: JJ+, AKs, AKo. Mixed: 66-TT, A7s-AQs, A2s-A4s, K5s+, K2s-K3s, Q6s+, Q4s, J7s+, T6s+, 97s+, 85s+, 75s+, 64s+, 54s, 42s, 32s, A9o-AQo, KJo+, QTo+, JTo, 65o.

Always fold
Q5s, Q2s-Q3s, J2s-J6s, T2s-T5s, 92s-96s, 82s-84s, 72s-74s, 62s-63s, 52s-53s, 43s, A2o-A8o, K2o-KTo, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o-64o, 52o+, 42o+, 32o
Always call
22-55, A5s-A6s, K4s
Always raise 5/7.5bb
JJ+, AKs, AKo
Mixed
66-TT, A7s-AQs, A2s-A4s, K5s+, K2s-K3s, Q6s+, Q4s, J7s+, T6s+, 97s+, 85s+, 75s+, 64s+, 54s, 42s, 32s, A9o-AQo, KJo+, QTo+, JTo, 65o
Settings: 5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.